无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

判斷題

An important difference between presupposition and entailment is that presupposition,unlike entailment,is not vulnerable to negation. That is to say, if a sentence is negated, the original presupposition is still true.

答案: 正確
微信掃碼免費(fèi)搜題